1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
# Copyright 2016 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Script to extract resources from a jar and put them into a separate zip file.
The input jar will be opened as a zip file, and its entries will be copied into
a new zip file, excepting any which are suspected not to be resources
(e.g., Java class files, etc).
Usage:
python resource_extractor.py <input jar> <output zip>
"""
from __future__ import print_function
import sys
import zipfile
USAGE = """Error, invalid arguments.
Usage: resource_extractor.py <input jar> <output zip>"""
EXCLUDED_EXTENSIONS = (
'.aidl', # Android interface definition files
'.rs', # RenderScript files
'.fs', # FilterScript files
'.rsh', # RenderScript header files
'.d', # Dependency files
'.java', # Java source files
'.scala', # Scala source files
'.class', # Java class files
'.scc', # Visual SourceSafe
'.swp', # vi swap file
'.gwt.xml', # Google Web Toolkit modules
'~', # backup files
'/', # empty directory entries
)
EXCLUDED_FILENAMES = (
'thumbs.db', # image index file
'picasa.ini', # image index file
'package.html', # Javadoc
'overview.html', # Javadoc
'protobuf.meta', # protocol buffer metadata
'flags.xml', # Google flags metadata
)
EXCLUDED_DIRECTORIES = (
'cvs', # CVS repository files
'.svn', # SVN repository files
'sccs', # SourceSafe repository files
'meta-inf' # jar metadata
)
def IsValidPath(path):
"""Checks if the provided path describes a resource.
Args:
path: the path to check
Returns:
True if the path is a resource.
"""
path = path.lower()
if any(path.endswith(extension) for extension in EXCLUDED_EXTENSIONS):
return False
segments = path.split('/')
filename = segments[-1]
if filename.startswith('.') or filename in EXCLUDED_FILENAMES:
return False
dirs = segments[:-1]
# allow META-INF/services at the root to support ServiceLoader
if dirs[:2] == ['meta-inf', 'services']:
return True
return not any(dir in EXCLUDED_DIRECTORIES for dir in dirs)
def ExtractResources(input_jar, output_zip):
for path in input_jar.namelist():
if IsValidPath(path):
output_zip.writestr(input_jar.getinfo(path), input_jar.read(path))
def main(argv):
if len(argv) != 3:
print(USAGE)
sys.exit(1)
with zipfile.ZipFile(argv[1], 'r') as input_jar:
with zipfile.ZipFile(argv[2], 'w') as output_zip:
ExtractResources(input_jar, output_zip)
if __name__ == '__main__':
main(sys.argv)
|
